I believe the answer to your question is going to be
D) Inflation is occurring.
If the Consumer Price Index rises then Inflation is occuring. Consumer price index calculate the price fluctuation in the market based on the total products purchased by consumers. If consumer price index rises, it means the average price of the product is currently increasing, which is directly linked to the rise in inflation.
Hope this helps!!:)) and if you want can u please mark brainliest!!